update appcache expectations for the two failing tests to match reality.

TBR=michaeln@chromium.org
BUG=268111

Review URL: https://codereview.chromium.org/22310003

git-svn-id: svn://svn.chromium.org/blink/trunk@155548 bbb929c8-8fbe-4397-9dbb-9b2b20218538